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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e57c49f3a08c94c7d1778c1f65d51c37201d7669fc2beb3157e98edd8ff8f3a' 
  AND token = 'pzh2253cFsuvbG7klaiSm1k0FDVJMsUsSb1G8S1jgxY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}